Combatting the Effects of Disorder in Quantum State Transfer
arXiv:2111.11695 · doi:10.1103/PhysRevA.105.032612
Abstract
In this paper, we examine disorder (i.e. static imperfections in manufacture) for the fixed-Hamiltonian evolution protocol of quantum state transfer. We improve the performance by optimising the choice of Hamiltonian, and by implementing an encoding/decoding procedure on small regions at either end of the chain. We find that encoding in only the single excitation subspace is optimal, and provides substantial enhancement to the operating regime of these systems.
arXiv comment12 pages, 3 figures
References in corpus (27)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Quantum Communication Through an Unmodulated Spin Chain
- Perfect state transfer in quantum spin networks
- Exact and Approximate Unitary 2-Designs: Constructions and Applications
- Perfect Transfer of Arbitrary States in Quantum Spin Networks
- Quantum Communication through Spin Chain Dynamics: an Introductory Overview
- A Review of Perfect State Transfer and its Application as a Constructive Tool
- Mirror Inversion of Quantum States in Linear Registers
- Spin Chains as Perfect Quantum State Mirrors
- Coherent Quantum Transport in Photonic Lattices
- Perfect quantum state transfer with randomly coupled quantum chains
- Perfect state transfer on a spin-chain without state initialization
- Experimental Perfect Quantum State Transfer
- Perfect State Transfer: Beyond Nearest-Neighbor Couplings
- Bounds on Information Propagation in Disordered Quantum Spin Chains
- Quantum Speed Limit for Perfect State Transfer in One Dimension
- Optimal dynamics for quantum-state and entanglement transfer through homogeneous quantum wires
- From perfect to fractal transmission in spin chains
- Number-Theoretic Nature of Communication in Quantum Spin Systems
- 99%-fidelity ballistic quantum-state transfer through long uniform channels
- Robustness of spin-coupling distributions for perfect quantum state transfer
- Multiuser quantum communication networks
- Optimal state encoding for quantum walks and quantum communication over spin systems
- Spin chains for robust state transfer: Modified boundary couplings vs. completely engineered chains
- Quantum Error Correction for State Transfer in Noisy Spin Chains
- Anderson localisation in spin chains for perfect state transfer
- Perfect Coding for Dephased Quantum State Transfer